Twisting and winding machine



1933. H. HOFMANN ET AL 9 TWISTING AND WINDING MACHINE Filed April 2, 1930 2 Sheets-Sheet l INVENTORS #1490 lye/man 3 Max E/forff J flea/f e 1933- H. HOFMANN ET AL 1,392,783

TWISTING AND WINDING MACHINE Filed April 2,. 1950 2 Sheets-Shet 2 INVENTORS Hugo Hofmann flax. E, lfarff f %M am,

ATTORNEY Patented Jan. 3, 1933 UNITED STATES HUGO HOFMANN AND MAX E. KORFF, OF JOHNSON CITY, TENNESSEE, ASSIGNORS 'I'O PATENT OFFICE AMERICAN IBEMBERG CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE TWISTING AND WINDING MAC HINE Application filed April 2,

This invention relates to the handling of textile yarns, such as silk or artificial silk, and has particular reference to an improved apparatus for twisting and winding such yarns.

In the textile industry the winding ma chines may be divided generally into two distinct classes, namely,-those in which the yarn speed changes periodically as the yarn guide moves across the bobbin surface and those in which the yarn speed remains constant during the winding of the yarn upon the bobbin.

It is an object of this invention to provide a combined twister and winder, the winder being of the first class referred to above. It is a further object to provide novel means for effecting a constant tension upon the yarn from the twister as the yarn is wound upon the winding bobbin at a speed varying from a minimum low to a maximum high. Other objects will become apparent.

In describing our invention, reference will be made to the drawings in which Fig. 1 is an end view of our combined twister and winder; Fig. 2 is an enlarged front elevation of our tension regulating device, and Fig. 3 is a side view of the device shown in Fig. 2.

Of the numerals appearing upon the several figures, 11- denotes an uptwister bobbin rotated by a moving belt 12 in contact with the pulley 13 fixed to the bobbin spindle 14.

The winding machine shown is a standard cop winder in which the cop 15 rotates at a uniform speed and the yarn is guided by the guide 16 which reciprocates with the shaft 17 opposite the conical surface 18 of the cop 15. The guide 16 is gradually moved outwardly as the yarn is wound upon the cop, by the contact of the yarn with the wheel 1611.

A tension regulator is positioned in the path of the yarn 19 between the uptwister 11 and the winding cop 15. This tension regulator comprises a roll 20, which is driven at a constant rate of speed through the shaft 21, and an idler roll 22, which is free to roll along the periphery of the roll 20. The idler roll 22 is carried upon the shaft 23 which reposes in the notches 24 in the U shaped end portion of the support 25. This su port 25 is pivoted about the shaft 21 an may be swung 1930. Serial No. 440,910.

through a suitable are a, limited by the lugs .26 and 27 positioned to contact with the stop 28. A counterbalance 29 may be adjust-ably suspended from the lower end 30 of the support 25.

In operating .our combined uptwister and winding machine, the yarn from the uptwister bobbin 11 passes through the eye 31, over a suflicient adhesion between the yarn and theroll 20 to draw the yarn from the uptwister at the circumferential speed of the roll 20.

The bobbin 11 and the feed roll 20 are'rotated at suitable relative rates of speed to produce the desired number of twists per unit length of yarn removed from the bobbin. The linear speed of the yarn being wound upon the cop 15 will vary periodically, with the reciprocations of the guide 16, from a minimum as the yarn is wound upon the portion of smallest diameter of the conical surface 18, to a maximum as the yarn is wound upon the portion of that surface which is of largest diameter. Therefore, since the feed roll 20 is rotating at a constant speed,

there will be a varying amount of slack in the yarn between the feed roll and the cop 15. This slack will be taken up, however, by the movement of the roll 22 as it rolls along the surface of the roll 20. When the tension upon the yarn between the feed roll and the winding bobbin is reduced, the roll 22 will move toward the position shown in full lines in Fig. 3 and take up any slack in the yarn.

When the tension upon this portion of the' yarn increases, the roll will be moved toward the dotted position by the tendency of the yarn to follow a straight line. The weight 29 may be adjusted to provide the desired pressure upon the yarn.

The spring support 33 will also serve to take up the slack resulting from the decrease in tension upon the yarn between the cop and the feed roll. Any variations in tension which may be carried beyond the feed roll 20 will be absorbed by the compression of the balloon formed above the uptwister by the centrifugal force of the rotating yarn.

Although we have described a single embodiment of our invention, it is apparent that it may be utilized in other forms.

What we claim is:

1. An apparatus for twistin and winding yarn, comprising a twister, a rawing roller to draw yarn from the twister at'a constant speed, a winder to wind the yarn at varying yarn speeds, an idling roller and a resiliently supported guide between the drawing roller and the winder to take up slack in the yarn.

2. An apparatus for twisting and winding yarn, comprising a twister, a drawing roller for drawing yarn from the twister at constant speed, a winder for winding the yarn at varying yarn s eeds and a roller supported to roll on the periphery of the drawing roller and take up slack in the yarn.

3. An apparatus for twisting and winding yarn, comprising an uptwister, a drawing roller for drawing yarn from the twister at constant speed, a winder for winding the yarn at varying yarn speeds, and an idling roller pivotally supported about the axis of the drawing roller and adapted to roll upon the eriphery of the drawing roller and take up s ack in the yarn. v

4. An apparatus for twistin and winding yarn, comprising a twister, a rawing roller for drawing yarn from the twister at constant speed, a winder for windin the yarn at varying yarn speeds, and an i ing roller pivotally supported about the axis of the drawing roller to take u slack in the yarn.

In testimony whereo we have signed our names to this specification this 2 day of March, 1930.

HUGO HOFMANN. MAX E. KORFF. 

